I purchased this bed needing a softer and bigger mattress (I'm a side sleeper). After researching the different kinds of beds, I went with a hybrid (mix of memory foam and inner coil springs). However, this bed is very hard, not as soft as some of the reviews said, which I know can be personal preference. If I could return this and get a memory foam mattress, I would. Instead I had to spend another $*** on a 3" memory foam topper to make this tolerable, and my back hasn't hurt as much since.